Abstract:

Objective To investigate the roles of anti-cyclic citrullinated peptide（CCP） antibody,anti-rheumatoid arthritis 33（RA33） antibody,anti-glucose-6-phosphate isomerase（GPI） antibody,anti-mutated citrullinated vimentin（MCV） antibody,rheumatoid factor（RF）,RF subtypes and erythrocyte sedimentation rate（ESR）for the diagnosis of rheumatoid arthritis（RA）. Methods A total of 165 patients with RA and 120 patients with mixed connective tissue disease were enrolled. A total of 80 healthy subjects were enrolled as healthy control group. Serum anti-CCP,anti-RA33,anti-GPI and anti-MCV antibodies,RF-IgA,RF-IgG,RF-IgM,RF and ESR were determined. Results The sensitivities of anti-CCP,anti-RA33,anti-GPI and anti-MCV antibodies,RF-IgA,RF-IgG,RF-IgM,RF and ESR in RA group were 85.4%,11.0%,67.2%,84.0%,82.4%,17.0%,83.6%,87.8% and 81.8%,respectively. Their specificities were 95.0%,98.3%,83.3%,90.0%,91.6%,95.8%,70.8%,83.3% and 70.8%,respectively. The sensitivity and specificity of the combined determination of anti- CCP antibody and anti-MCV antibody were 98.8% and 96.7% in RA group. Conclusions Anti-CCP and anti-MCV antibodies can be biomarkers for the diagnosis of RA. Combining the results of anti-RA33 and anti-GPI antibodies,RF-IgA,RF-IgG,RF-IgM,RF and ESR,the diagnosis of RA can be improved.

Key words: Anti-cyclic citrullinated peptide antibody, Anti-rheumatoid arthritis 33 antibody, Anti-glucose-6-phosphate isomerase antibody, Anti-mutated citrullinated vimentin antibody, Rheumatoid factor, Erythrocyte sedimentation rate, Rheumatoid arthritis